Dormitive
Pronunciation : Dor"mi*tive
Part of Speech : a.
Etymology : [Cf. F. dormitif, fr. dormire to sleep.]
Definition : Defn: Causing sleep; as, the dormitive properties of opium. Clarke. -- n. (Med.)
Defn: A medicine to promote sleep; a soporific; an opiate.
Source : Webster's Unabridged Dictionary, 1913